//严格的条件下运行，严格模式下你不能使用未声明的变量，在 JavaScript 旧版本中会被忽略
'use strict';
const path = require('path');

function resolve(dir) {
    return path.join(__dirname,dir)
}
//系统名称
const name = "Maple' Blog后台管理系统";
//端口
const port =process.env.port || process.env.npm_config_port || 80;

//vue.config.js 官方配置说明：https://cli.vuejs.org/zh/config/#vue-config-js
module.exports = {
    //部署生产环境和开发环境下的URL。默认情况下，vue cli会假设你的应用是被部署在一个域名的根路径上
    //如果应用被部署在一个子路径上，你就需要用这个选项指定这个子路径。录入你的应用部署在/admin/,则设置baseUrl未/admin/
    publicPath: process.env.NODE_ENV === "production" ? "/" : "/",
    //在 npm run build 或yarn build 时，生成文件的目录名称（要和baseUrl的生产路径一致），默认dist
    outputDir: 'dist',
    //用于放置生成的静态资源（js,css,img,fonts），项目打包后，静态资源会放在该文件夹下。
    assetsDir: 'static',
    //是否开启eslint保存检测，有效值： true|false|'error'
    lintOnSave: process.env.NODE_ENV === 'development',
    //如果你不需要生成环境的source map，可以设置未false以加速生产环境构建
    productionSourceMap: false,
    //webpack-dev-server 相关配置
    //新版的webpack-dev-server出于安全考虑，默认检查hostname，如果hostname不是配置内的，将中断访问.
    //可以使用disableHostCheck（是否关闭IP检测）
    devServer: {
        host: '0.0.0.0',
        port: port,
        proxy: {
            [process.env.VUE_APP_BASE_API]: {
                target: `http://localhost:8888`,
                changeOrigin: true,
                pathRewrite: {
                    ['^' + process.env.VUE_APP_BASE_API]: ''
                }
            }
        },
        disableHostCheck: true
    },
    configureWebpack: {
        name: name,
        resolve: {
            alias: {
                '@': resolve('src'),
            }
        }
    },
    chainWebpack(config) {
        config.plugins.delete('preload');
        config.plugins.delete('prefetch');

        //set svg-sprite-loader
        config.module
            .rule('svg')
            .exclude.add(resolve('src/assets/icons'))
            .end();
        config.module
            .rule('icons')
            .test(/\.svg$/)
            .include.add(resolve('src/assets/icons'))
            .end()
            .use('svg-sprite-loader')
            .loader('svg-sprite-loader')
            .options({
                symbolId: 'icon-[name]'
            })
            .end();

        // set preserveWhitespace
        config.module
            .rule('vue')
            .use('vue-loader')
            .loader('vue-loader')
            .tap(options => {
                options.compilerOptions.preserveWhitespace = true;
            return options;
        }).end();

        config.when(process.env.NODE_ENV === 'development',
            config => config.devtool('cheap-source-map'));

        config.when(process.env.NODE_ENV !== 'development',
            config => {
                config.plugin('ScriptExtHtmlWebpackPlugin')
                    .after('html')
                    .use('script-ext-html-webpack-plugin',[{
                        // `runtime` must same as runtimeChunk name. default is `runtime`
                        inline: /runtime\..*\.js$/
                    }])
                    .end();
                config.optimization.splitChunks({
                    chunks: 'all',
                    cacheGroups: {
                        libs: {
                            name: 'chunk-libs',
                            test: /[\\/]node_modules[\\/]/,
                            priority: 10,
                            chunks: 'install' //only package third parties that are initially dependent
                        },
                        elementUI: {
                            name: 'chunk-elementUI', // split elementUI into a single package
                            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                        },
                        commons: {
                            name: 'chunk-commons',
                            test: resolve('src/components'), // can customize your rules
                            minChunks: 3, //  minimum common number
                            priority: 5,
                            reuseExistingChunk: true
                        }
                    }
                });
                config.optimization.runtimeChunk('single')
            })

    }

};
